Concentrator.



No. 630.989. Paten ted Aug. I5, 1899. c. L. ROSE & w. P. HYATT.

GONCENTRATOR.

(Application filed Aug. 20, 1898.

No Model.)

UNITED STATES PATENT OFFICE.

CHARLES L. ROSE AND WVILLIAM P. I-IYATT, OF OPIIIR, COLORADO, ASSIGN- ORS OF ONE-THIRD TO CHARLES W. TREMAIN, OF CHICAGO, ILLINOIS.

CONCENTRATOR.

SPECIFICATION forming part of Letters Patent No. 630,989, dated August 15, 1899.

Application filed August 2 O, 1 8 9 8.

To (bi/Z wltmn it may concern:

Be it known that we, CHARLES L. ROSE and \VILLIAu P. IIYATT, citizens of the United States, residing at Ophir, in the county of San Miguel and State of Colorado, have invented a certain new and useful Improvement in Concentrators, of which the following is a specification, reference being had to the accompanying drawings.

This improvement relates to that class of concentrators in which an endless apron is employed; and the invention consists in the construction hereinafter more particularly described and then definitely claimed at the end hereof.

In the accompanying drawings, Figure 1 is a plan of a concentrator constructed according to our improvement. Fig. 2 is an elevation of the same. Fig. 3 is a perspective view of a part of the band of the concentrator on a larger scale, with part represented as broken away. Fig. 4 is a sectional detail representing part of the frame and bed of the machine.

Referring now to the details of the drawings by numbers, 1 indicates the base of the machine, in which is set a tank 2, having a revolving brush 3 therein, which is operated by a chain 4, driven by a sprocket-wheel 5 on the shaft 6, which carries a cylinder 7, around which and the cylinder 8 passes a belt 9, which will be further described hereinafter. The belt also passes over a roller 10, mounted in adjustable brackets 12, and under another roller 11, also mounted on brackets 13, attached to the frame 14, which is formed of angle-iron 15, as shown in Fig. 4, to which is attached the bed 16 of galvanized iron, and which is further supported by strips of hard wood 17. This frame is pivotally connected to standards 18 and 18, and in the latter slides a movable portion 19, adjustable by means of the hand-wheel 20 and lever-nut 21, which latter locks the wheel in position when the apron has been adjusted to its proper inclination to suit the material being concen trated. On the top of this movable portion is shown a screw 22, which bears againstlugs 23 on the brackets 24:, which carry the cylinder 8.

The shaft 6 of the cylinder 7 carries a gearwheel 25, in which meshes a screw 26 on a Serial No. 689,145. (No model.)

shaft 27, on which are mounted band-pulleys 28, designed to receive a belt from any suitable motor.

-At opposite sides of the frame are mounted brackets 29, on each of which is pivoted a lever 30, carrying the sand-distributer 31'and water-distributer 32, both being pivotally connected to the lever. The shaft 27 has at its right-hand end a face-plate 33, carrying a wrist-pin 34, which is connected by a pitman 35 with the water-distributer, and as the shaft 27 revolves it gives motion (through said pitman) to the.water-distributer, which in turn gives motion to the sand-distributer. It will be seen that by this construction the sand and water distributors are supported by the levers 30 and that they give said distributers motion in opposite directions, which not only causes the inertia of one to nearly counterbalance the other, but makes the streams of water and sand to cross each other, whereby the two are more intimately commingled.

The apron is preferably formed of two layers of canvas 37 38, with a series of copper rivets 39 set in the outer layer. The rivets are preferably set in straight rows across the apron; but the succeeding rows are so arranged as to make diagonal rows, as shown by the dotted lines in the upper left corner of Fig. 1. The two layers of canvas should be united by waterproof cement, by which means the rivets will become firmly attached and are not likely to work out. The distance apart of the rivets or projections may be varied to suit the particular ore intended to be operated on, and our experience leads us to believe that the best results will be achieved by placing them at from one-half to an inch apart. The apron should be set a little more inclined than is usual when the beltis shake at the side or end.

The operation is as follows: Motion being given to the pulley 28 by any suitable power, the belt is caused to travel up the incline and the sand is spread upon it by the distributer 31 and the water by the water-distributer 32, and the gangue as it runs down the apron is broken up into little eddies by the rivets and complete disintegration and concentration are effected and the minerals are thoroughly separated from the gangue or sand, the latter passing off at the lower endof the machine, while the precious metals are carried up over the upper end and down to the tank 2, where they are mostly if not wholly removed from the apron by the water in the tank; but should any fail to fall into the tank the brush 3 will surely remove it.

We do not propose to limit ourselves to the use of our apron to the peculiar mechanism shown, as it is evident that said apron may be used with different machines.

What we claim as new is 1. A concentrator-apron comprising two layers of flexible material and a series of headed metallic pins, the latter having their shanks passing through the upper layer, and their heads resting upon the under layer, and both layers and heads being cemented together whereby the latter are securely held between the former, substantially as described.

2. The combination in a concentrator of an endless apron with sand and water distributors, and mechanism substantially as described for giving the same a lateral recipro- 2 5 catin g movement in opposite directions as set forth.

3. The combination in a concentrator, of an endless apron, a suitable frame supporting the same, brackets 29 on opposite sides of 30 said frame, levers 30 pivotally supported on said brackets, a sand-distributer 31 and water-distributer 82 resting upon the opposite ends of said levers, a pitman 35 connected with the water-distributer, and means for giving said pitman a reciprocating motion, all substantially as described and shown.

In testimony whereof we affix our signa= tures, in the presence of two witnesses, this 27th day of July, 1898.

CHARLES L. ROSE. WILLIAM P. HYATT.

Witnesses:

H. G. GILKERsoN, G. A. SEBRING. 

